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. 2016 Jun 27;11(6):e0157898. doi: 10.1371/journal.pone.0157898

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© 2016 Li et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — A. Progress in healing of skin wounds after 15 min and 30 min duration of light exposure. 1, 2 and 3 represent red light, blue light and control groups. B, C. Healing area percentage of wounds in 15 and 30 min groups; the healing area percentage in the red light group is higher than that in control group at day 12, 15, 18 and 21 after infliction of wounds. D, E. Healing area percentage comparison between the two red light groups, and two blue light groups. The percentage in 15 min red light group was significantly higher than that in 30 min red light group on day 2. The percentage in 15 min blue light group was higher than that in 30 min blue light group on day 2 and 4 after wounds production. (*P < 0.05, **P < 0.01).